Senior Software Engineer

Marvin Behavioral Health

. Own features end to end across the Next.js/React/TypeScript application, Prisma/Postgres backend, and AWS infrastructure .

Posted 10/27/2026full-timeUnited StatesSenior💰 $160,000 - $190,000 per yearWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in building production web applications using TypeScript, React, and Next.js, while effectively managing sensitive health data and collaborating with cross-functional teams. Proficient in AI-assisted development practices and LLM feature implementation, ensuring high-quality outputs and adherence to compliance standards.

Highest-signal resume keywords

TypeScript ExpertiseReact DevelopmentAWS Cloud DeploymentAI Feature ImplementationHealthcare Compliance Experience

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

Next.jsNode.jsPrismaPostgresUnit TestingComponent TestingEnd-to-End TestingAgentic Coding ToolsLLM Feature ShippingRelational Data Modeling

Soft Skills

Product JudgmentMentoringCollaboration

Tools & Technologies

AWSDockerTerraformVitestStorybookCypressPlaywrightLangSmithBraintrustLangfuse

Industry Keywords

HealthcareBenefitsPHI BoundariesHIPAASOC 2

Tech Stack

Tools & technologies

AWSCloudCypressDockerJavaScriptNext.jsNode.jsOpen SourcePostgresReactTerraformTypeScript

About the role

Key responsibilities & impact

Own features end to end across the Next.js/React/TypeScript application, Prisma/Postgres backend, and AWS infrastructure
Extend the AI coach and build LLM-powered member experiences, including retrieval over benefits data, structured extraction, guided flows, and agentic tool use against internal APIs
Design evaluation and observability for AI features to detect degradation as well as failures
Advance AI-assisted development practices through agent instructions, reusable skills, hooks, MCP integrations, and review practices
Handle sensitive health data responsibly, including PHI boundaries, redaction, audit trails, and vendor data agreements
Review human- and agent-written code critically
Mentor teammates and improve testing and reliability
Collaborate with design, clinical, and partner-facing teammates

Requirements

What you’ll need

5+ years building production web applications
Deep TypeScript, React, and Node experience; Next.js is a strong plus
Experience with relational data modeling using Prisma and Postgres
Experience with auth flows, caching, background jobs, and cloud deployment using AWS, Docker, Terraform or similar
Experience with unit, component, and end-to-end testing; Vitest, Storybook, Cypress, and Playwright
Strong product judgment and ability to work directly with design, clinical, and partner-facing teammates
Daily, expert use of agentic coding tools such as Claude Code, Cursor, or Codex
Experience writing project instructions and reusable skills for coding agents, assigning multi-step tasks, and reviewing generated output
Hands-on experience shipping LLM features, including prompt design and versioning, structured outputs, tool/function calling, streaming UIs, retrieval-augmented generation, and multi-turn conversation state
Experience running evaluations and tracing production LLM traffic using LangSmith, Braintrust, Langfuse, or homegrown tools
Understanding of model selection, caching, prompt compression, fallback strategies, and cost, latency, and quality trade-offs
Understanding when to use or constrain LLMs and prevent hallucinations from reaching members
Healthcare, benefits, or regulated-data experience such as HIPAA or SOC 2 is nice to have
Experience building MCP servers or internal agent tooling is nice to have
Experience with Clerk, Stripe, or Sentry is nice to have
Contributions to AI developer tooling, open source, or internal projects are nice to have
Must live near the Greater Los Angeles area or Denver

Benefits

Comp & perks

Equity
Health, dental, and vision
401(k)
Unlimited PTO
Hybrid 2 days/wk in office (LA or Denver)